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  • 1
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    Protein kinase B kinases that mediate phosphatidylinositol 3,4,5-trisphosphate-dependent activation of protein kinase B (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-02-21
    Description: Protein kinase B (PKB) is activated in response to phosphoinositide 3-kinases and their lipid products phosphatidylinositol 3,4, 5-trisphosphate [PtdIns(3,4,5)P3] and PtdIns(3,4)P2 in the signaling pathways used by a wide variety of growth factors, antigens, and inflammatory stimuli. PKB is a direct target of these lipids, but this regulation is complex. The lipids can bind to the pleckstrin homologous domain of PKB, causing its translocation to the membrane, and also enable upstream, Thr308-directed kinases to phosphorylate and activate PKB. Four isoforms of these PKB kinases were purified from sheep brain. They bound PtdIns(3,4,5)P3 and associated with lipid vesicles containing it. These kinases contain an NH2-terminal catalytic domain and a COOH-terminal pleckstrin homologous domain, and their heterologous expression augments receptor activation of PKB, which suggests they are the primary signal transducers that enable PtdIns(3,4,5)P3 or PtdIns- (3,4)P2 to activate PKB and hence to control signaling pathways regulating cell survival, glucose uptake, and glycogen metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stephens, L -- Anderson, K -- Stokoe, D -- Erdjument-Bromage, H -- Painter, G F -- Holmes, A B -- Gaffney, P R -- Reese, C B -- McCormick, F -- Tempst, P -- Coadwell, J -- Hawkins, P T -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1998 Jan 30;279(5351):710-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Inositide Laboratory, The Babraham Institute, Babraham, Cambridge CB2 4AT, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9445477" target="_blank"〉PubMed〈/a〉
    Keywords: 3-Phosphoinositide-Dependent Protein Kinases ; Alternative Splicing ; Amino Acid Sequence ; Animals ; Cell Line ; Cell Membrane/enzymology ; Cloning, Molecular ; DNA, Complementary ; Drosophila ; Drosophila Proteins ; Enzyme Activation ; Humans ; Liposomes/metabolism ; Molecular Sequence Data ; Open Reading Frames ; Phosphatidylinositol Phosphates/*metabolism ; Phosphorylation ; Platelet-Derived Growth Factor/pharmacology ; Protein-Serine-Threonine Kinases/chemistry/genetics/isolation & ; purification/*metabolism ; Proto-Oncogene Proteins/*metabolism ; Proto-Oncogene Proteins c-akt ; Rats ; Recombinant Proteins/metabolism ; Sheep ; *Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    Regulation of Ras-GAP and the neurofibromatosis-1 gene product by eicosanoids (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-26
    Description: Ras-GAP (GTPase activating protein) is a regulatory protein that stimulates the intrinsic guanosine triphosphatase (GTPase) activity of the proto-oncogene product p21ras. A domain of the neurofibromatosis gene product (NF1) that has sequence similarity to the catalytic domain of Ras-GAP and to yeast IRA gene products also has a specific stimulatory activity toward p21ras GTPase. Arachidonic acid and phosphatidic acid inactivate GAP, but no agents have been identified that stimulate GAP and thereby switch p21ras off. With the use of recombinant Ha-c-Ras and Ras-GAP, NF1, and GAP catalytic domains, it was found that prostaglandins PGF2 alpha and PGA2 stimulated Ras-GAP and that prostacyclin PGI2 inhibited Ras-GAP. The stimulatory effect of PGF2 alpha was saturable and structure-specific and competed with the inhibitory effect of arachidonic acid. Arachidonic acid also inhibited the catalytic activity of NF1, but prostaglandins were not stimulatory. These results suggest a mechanism for the allosteric control of Ras function through the modulation of arachidonate metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Han, J W -- McCormick, F -- Macara, I G -- CA 38888/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1991 Apr 26;252(5005):576-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biophysics, University of Rochester Medical Center, NY 14642.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1902323" target="_blank"〉PubMed〈/a〉
    Keywords: Arachidonic Acid ; Arachidonic Acids/pharmacology ; Dinoprost/pharmacology ; GTP Phosphohydrolases/metabolism ; GTPase-Activating Proteins ; Gene Expression Regulation/drug effects ; Genes, ras/*drug effects ; Guanosine Triphosphate/metabolism ; Humans ; Kinetics ; Neurofibromatosis 1/genetics ; Neurofibromin 1 ; Prostaglandins/*pharmacology ; Proteins/*genetics ; Proto-Oncogene Proteins p21(ras)/metabolism ; Recombinant Proteins/metabolism ; ras GTPase-Activating Proteins
    Print ISSN: 0036-8075
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  • 3
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    GAP domains responsible for ras p21-dependent inhibition of muscarinic atrial K+ channel currents (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-01-10
    Description: The interaction between the low molecular weight G protein ras p21 and a guanosine triphosphatase activating protein (GAP) uncouples a heterotrimeric G protein (Gk) from muscarinic receptors. Through the use of isolated atrial cell membranes and genetically engineered GAP deletion mutants, the src homology regions (SH2-SH3) at the amino terminus of GAP have been identified as the domains responsible for this effect. Deletion of the domain required to stimulate the guanosine triphosphatase activity of ras p21 relieves the requirement for ras p21 in this system. A model is presented that suggests that ras p21 induces a conformational change in GAP, which allows the SH2-SH3 regions of GAP to function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martin, G A -- Yatani, A -- Clark, R -- Conroy, L -- Polakis, P -- Brown, A M -- McCormick, F -- CA51992-01/CA/NCI NIH HHS/ -- HL36930/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1992 Jan 10;255(5041):192-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Cetus Corporation, Emeryville, CA 94608.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1553544" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Baculoviridae ; Cell Membrane/metabolism ; Cells, Cultured ; Cloning, Molecular ; GTP-Binding Proteins/*physiology ; GTPase-Activating Proteins ; Genetic Engineering ; Genetic Vectors ; Guanosine 5'-O-(3-Thiotriphosphate)/pharmacology ; Guanosine Triphosphate/pharmacology ; Guinea Pigs ; Heart/*physiology ; Heart Atria ; Models, Biological ; Polymerase Chain Reaction ; Potassium Channels/drug effects/*physiology ; Proteins/genetics/*physiology ; Proto-Oncogene Proteins p21(ras)/*metabolism ; Receptors, Muscarinic/drug effects/*physiology ; ras GTPase-Activating Proteins
    Print ISSN: 0036-8075
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  • 4
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    Inhibition of GTPase activating protein stimulation of Ras-p21 GTPase by the Krev-1 gene product (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-07-13
    Description: Krev-1 is known to suppress transformation by ras. However, the mechanism of the suppression is unclear. The protein product of Krev-1, Rap1A-p21, is identical to Ras-p21 proteins in the region where interaction with guanosine triphosphatase (GTPase) activating protein (GAP) is believed to occur. Therefore, the ability of GAP to interact with Rap1A-p21 was tested. Rap1A-p21 was not activated by GAP but bound tightly to GAP and was an effective competitive inhibitor of GAP-mediated Ras-GTPase activity. Binding of GAP to Rap1A-p21 was strictly guanosine triphosphate (GTP)-dependent. The ability of Rap1A-p21 to bind tightly to GAP may account for Krev-1 suppression of transformation by ras. This may occur by preventing interaction of GAP with Ras-p21 or with other cellular proteins necessary for GAP-mediated Ras GTPase activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frech, M -- John, J -- Pizon, V -- Chardin, P -- Tavitian, A -- Clark, R -- McCormick, F -- Wittinghofer, A -- New York, N.Y. -- Science. 1990 Jul 13;249(4965):169-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institute fur medizinische Forschung, Abteilung Biophysik, Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2164710" target="_blank"〉PubMed〈/a〉
    Keywords: Binding, Competitive ; Enzyme Activation ; Escherichia coli/enzymology/genetics ; GTP Phosphohydrolases/genetics/*metabolism ; GTP-Binding Proteins/genetics/*metabolism ; GTPase-Activating Proteins ; Oncogene Protein p21(ras)/*metabolism ; Phosphoric Monoester Hydrolases/*metabolism ; Protein Binding ; Proteins/*antagonists & inhibitors ; *Suppression, Genetic ; rap GTP-Binding Proteins ; ras GTPase-Activating Proteins
    Print ISSN: 0036-8075
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  • 5
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    Heterogeneous amino acids in Ras and Rap1A specifying sensitivity to GAP proteins (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-13
    Description: Guanosine triphosphatase (GTPase) activity of Ras is increased by interaction with Ras-GAP (GTPase-activating protein) or with the GAP-related domain of the type 1 neurofibromatosis protein (NF1-GRD), but Ras is not affected by interaction with cytoplasmic and membrane forms of Rap-GAP; Rap1A, whose effector function can suppress transformation by Ras, is sensitive to both forms of Rap-GAP and resistant to Ras-GAP and NF1-GRD. A series of chimeric proteins composed of portions of Ras and Rap were constructed; some were sensitive to Ras-GAP but resistant to NF1-GRD, and others were sensitive to cytoplasmic Rap-GAP but resistant to membrane Rap-GAP. Sensitivity of chimeras to Ras-GAP and cytoplasmic Rap-GAP was mediated by amino acids that are carboxyl-terminal to the effector region. Residues 61 to 65 of Ras conferred Ras-GAP sensitivity, but a larger number of Rap1A residues were required for sensitivity to cytoplasmic Rap-GAP. Chimeras carrying the Ras effector region that were sensitive only to Ras-GAP or only to cytoplasmic Rap-GAP transformed NIH 3T3 cells poorly. Thus, distinct amino acids of Ras and Rap1A mediate sensitivity to each of the proteins with GAP activity, and transforming potential of Ras and sensitivity of Ras to Ras-GAP are at least partially independent properties.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, K -- Papageorge, A G -- Martin, P -- Vass, W C -- Olah, Z -- Polakis, P G -- McCormick, F -- Lowy, D R -- New York, N.Y. -- Science. 1991 Dec 13;254(5038):1630-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cellular Oncology, National Cancer Institute, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1749934" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Membrane/metabolism ; Cytosol/metabolism ; Enzyme Activation ; GTP-Binding Proteins/*physiology ; GTPase-Activating Proteins ; Genes, Neurofibromatosis 1 ; In Vitro Techniques ; Proteins/*physiology ; Proto-Oncogene Proteins p21(ras)/*physiology ; Recombinant Fusion Proteins ; Structure-Activity Relationship ; rap GTP-Binding Proteins ; ras GTPase-Activating Proteins
    Print ISSN: 0036-8075
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  • 6
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    Dual role of phosphatidylinositol-3,4,5-trisphosphate in the activation of protein kinase B (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-25
    Description: Protein kinase B (PKB) is a proto-oncogene that is activated in signaling pathways initiated by phosphoinositide 3-kinase. Chromatographic separation of brain cytosol revealed a kinase activity that phosphorylated and activated PKB only in the presence of phosphatidylinositol-3,4,5-trisphosphate [PtdIns(3,4,5)P3]. Phosphorylation occurred exclusively on threonine-308, a residue implicated in activation of PKB in vivo. PtdIns(3,4,5)P3 was determined to have a dual role: Its binding to the pleckstrin homology domain of PKB was required to allow phosphorylation by the upstream kinase and it directly activated the upstream kinase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stokoe, D -- Stephens, L R -- Copeland, T -- Gaffney, P R -- Reese, C B -- Painter, G F -- Holmes, A B -- McCormick, F -- Hawkins, P T -- New York, N.Y. -- Science. 1997 Jul 25;277(5325):567-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Onyx Pharmaceuticals, 3031 Research Drive, Richmond, CA 94806, USA. stokoe@cc.ucsf.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9228007" target="_blank"〉PubMed〈/a〉
    Keywords: 3-Phosphoinositide-Dependent Protein Kinases ; Adenosine Triphosphate/metabolism ; Amino Acid Sequence ; Animals ; Blood Proteins/chemistry ; Brain/enzymology ; COS Cells ; Cytosol/enzymology ; Enzyme Activation ; Humans ; Male ; Molecular Sequence Data ; Phosphatidylinositol Phosphates/*metabolism ; *Phosphoproteins ; Phosphorylation ; Phosphothreonine/metabolism ; Protein-Serine-Threonine Kinases/chemistry/*metabolism ; Proto-Oncogene Proteins/chemistry/*metabolism ; Proto-Oncogene Proteins c-akt ; Rats ; Rats, Sprague-Dawley ; Signal Transduction ; Stereoisomerism
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  • 7
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    Inhibition by cAMP of Ras-dependent activation of Raf (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-11-12
    Description: Activation of the Raf and extracellular signal-regulated kinases (ERKs) (or mitogen-activated protein kinases) are key events in mitogenic signalling, but little is known about interactions with other signaling pathways. Agents that raise levels of intracellular cyclic adenosine 3',5'-monophosphate (cAMP) blocked DNA synthesis and signal transduction in Rat1 cells exposed to epidermal growth factor (EGF) or lysophosphatidic acid. In the case of EGF, receptor tyrosine kinase activity and association with the signaling molecules Grb2 and Shc were unaffected by cAMP. Likewise, EGF-dependent accumulation of the guanosine 5'-triphosphate-bound form of Ras was unaffected. In contrast, activation of Raf-1 and ERK kinases was inhibited. Thus, cAMP appears to inhibit signal transmission from Ras by preventing Ras-dependent activation of Raf-1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cook, S J -- McCormick, F -- UO1 CA51992-03/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1993 Nov 12;262(5136):1069-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Onyx Pharmaceuticals, Richmond, CA 94806.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7694367" target="_blank"〉PubMed〈/a〉
    Keywords: 1-Methyl-3-isobutylxanthine/pharmacology ; Animals ; Bucladesine/pharmacology ; Calcium-Calmodulin-Dependent Protein Kinases/*metabolism ; Cell Line ; Cholera Toxin/pharmacology ; Cyclic AMP/*pharmacology ; Cyclic AMP-Dependent Protein Kinases/metabolism ; Enzyme Activation ; Epidermal Growth Factor/pharmacology ; Interphase ; Lysophospholipids/pharmacology ; Mitogen-Activated Protein Kinase 1 ; Mitogen-Activated Protein Kinase 3 ; *Mitogen-Activated Protein Kinases ; Phosphorylation ; Protein-Tyrosine Kinases/*metabolism ; Proto-Oncogene Proteins/*metabolism ; Proto-Oncogene Proteins c-raf ; Proto-Oncogene Proteins p21(ras)/*metabolism ; Rats ; Receptor, Epidermal Growth Factor/metabolism ; *Signal Transduction
    Print ISSN: 0036-8075
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  • 8
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    An adenovirus mutant that replicates selectively in p53-deficient human tumor cells (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-10-18
    Description: The human adenovirus E1B gene encodes a 55-kilodalton protein that inactivates the cellular tumor suppressor protein p53. Here it is shown that a mutant adenovirus that does not express this viral protein can replicate in and lyse p53-deficient human tumor cells but not cells with functional p53. Ectopic expression of the 55-kilodalton EIB protein in the latter cells rendered them sensitive to infection with the mutant virus. Injection of the mutant virus into p53-deficient human cervical carcinomas grown in nude mice caused a significant reduction in tumor size and caused complete regression of 60 percent of the tumors. These data raise the possibility that mutant adenoviruses can be used to treat certain human tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bischoff, J R -- Kirn, D H -- Williams, A -- Heise, C -- Horn, S -- Muna, M -- Ng, L -- Nye, J A -- Sampson-Johannes, A -- Fattaey, A -- McCormick, F -- New York, N.Y. -- Science. 1996 Oct 18;274(5286):373-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉ONYX Pharmaceuticals, 3031 Research Drive, Richmond, CA 94806, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8832876" target="_blank"〉PubMed〈/a〉
    Keywords: Adenovirus E1B Proteins/*genetics/metabolism ; Adenoviruses, Human/genetics/*physiology ; Animals ; Cytopathogenic Effect, Viral ; Gene Deletion ; *Genes, p53 ; Head and Neck Neoplasms/*therapy/virology ; Humans ; Mice ; Mice, Nude ; Mutation ; Neoplasm Transplantation ; Neoplasms, Experimental/pathology/*therapy/virology ; Sigmodontinae ; Transplantation, Heterologous ; Tumor Cells, Cultured ; Tumor Suppressor Protein p53/metabolism ; Virus Replication
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  • 9
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    Binding of 14-3-3 proteins to the protein kinase Raf and effects on its activation (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-09-16
    Description: To identify proteins that may participate in the activation of the protein kinase Raf, proteins that interact with Raf were selected in a two-hybrid screen. Two members of the 14-3-3 protein family were isolated that interacted with both the amino terminal regulatory regions of Raf and the kinase domain of Raf, but did not compete with the guanine nucleotide-binding protein Ras for binding to Raf. 14-3-3 proteins associated with Raf in mammalian cells and accompanied Raf to the membrane in the presence of activated Ras. In yeast cells expressing Raf and MEK, mammalian 14-3-3 beta or 14-3-3 zeta activated Raf to a similar extent as did expression of Ras. Therefore, 14-3-3 proteins may participate in or be required for the regulation of Raf function. These findings suggest a role for 14-3-3 proteins in Raf-mediated signal transduction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freed, E -- Symons, M -- Macdonald, S G -- McCormick, F -- Ruggieri, R -- New York, N.Y. -- Science. 1994 Sep 16;265(5179):1713-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Onyx Pharmaceuticals, Richmond, CA 94806-5206.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8085158" target="_blank"〉PubMed〈/a〉
    Keywords: 14-3-3 Proteins ; Amino Acid Sequence ; Animals ; Cell Line ; Cell Membrane/enzymology ; Cytosol/enzymology ; Enzyme Activation ; GTP-Binding Proteins/metabolism ; HeLa Cells ; Humans ; MAP Kinase Kinase 1 ; *Mitogen-Activated Protein Kinase Kinases ; Molecular Sequence Data ; Nerve Tissue Proteins/*metabolism ; Protein-Serine-Threonine Kinases/chemistry/genetics/*metabolism ; Protein-Tyrosine Kinases/genetics/metabolism ; Proto-Oncogene Proteins/chemistry/*metabolism ; Proto-Oncogene Proteins c-raf ; Recombinant Proteins/metabolism ; Saccharomyces cerevisiae/genetics/growth & development ; Signal Transduction ; *Tyrosine 3-Monooxygenase ; Zinc Fingers
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  • 10
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    Germline mutations in genes within the MAPK pathway cause cardio-facio-cutaneous syndrome (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-01-28
    Description: Cardio-facio-cutaneous (CFC) syndrome is a sporadic developmental disorder involving characteristic craniofacial features, cardiac defects, ectodermal abnormalities, and developmental delay. We demonstrate that heterogeneous de novo missense mutations in three genes within the mitogen-activated protein kinase (MAPK) pathway cause CFC syndrome. The majority of cases (18 out of 23) are caused by mutations in BRAF, a gene frequently mutated in cancer. Of the 11 mutations identified, two result in amino acid substitutions that occur in tumors, but most are unique and suggest previously unknown mechanisms of B-Raf activation. Furthermore, three of five individuals without BRAF mutations had missense mutations in either MEK1 or MEK2, downstream effectors of B-Raf. Our findings highlight the involvement of the MAPK pathway in human development and will provide a molecular diagnosis of CFC syndrome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rodriguez-Viciana, Pablo -- Tetsu, Osamu -- Tidyman, William E -- Estep, Anne L -- Conger, Brenda A -- Cruz, Molly Santa -- McCormick, Frank -- Rauen, Katherine A -- HD048502/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2006 Mar 3;311(5765):1287-90. Epub 2006 Jan 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Comprehensive Cancer Center and Cancer Research Institute, University of California, San Francisco, CA 94115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16439621" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Multiple/*genetics ; Adolescent ; Adult ; Amino Acid Substitution ; Child ; Child, Preschool ; Craniofacial Abnormalities/genetics ; Extracellular Signal-Regulated MAP Kinases/metabolism ; Female ; *Germ-Line Mutation ; Growth Disorders/genetics ; Heart Defects, Congenital/genetics ; Humans ; Infant ; MAP Kinase Kinase 1/genetics ; MAP Kinase Kinase 2/genetics ; MAP Kinase Kinase Kinases/metabolism ; MAP Kinase Signaling System ; Male ; Mitogen-Activated Protein Kinases/genetics/*metabolism ; Mutation, Missense ; Phosphorylation ; Proto-Oncogene Proteins B-raf/genetics ; Skin Abnormalities/genetics ; Syndrome ; Transfection
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